Group sex most commonly takes place in a private sex party or semi-public swinger gathering, but may also take place at massage parlors or brothels or, in some jurisdictions, at purpose-built locations such as sex clubs. The warm sensation felt when urine trickles on the body seems to give very relaxing and pleasurable feelings to the person. The term is typically used by the cinematographer within the narrative framework of a pornographic film, and since the 1970s has become a leitmotif of the hardcore genre. At the end of the evening the female partners would randomly select keys from the bowl and leave gay movies with that key owner. Breast fetishism is a paraphilic sexual interest focused on female breasts . Biological anthropologist Helen B. Clothed female, naked male pornography features naked men and clothed women; typically, the women humiliate and abuse the men or perform fellatio and/or handjobs on the men. Macrophilia is a fascination with or a sexual fantasy involving giants, more commonly expressed as giantesses . Lying face down one may use the hands, one may straddle a pillow, the corner or edge of the bed, a partner leg or some scrunched-up clothing and hump the vulva and clitoris against it. Contrary to the other two types, B/D does not define the Tops and Bottoms itself, and is used to describe the general activities with either partner being the receiver and the giver. Common phrases used to refer to these individuals are chicks with dicks or the derogatory term shemale, although these are generally considered pejorative milf xxx among transwomen. Most bisexual porn is made by small production companies hentai movies rather than the major studios. Point of view pornography is adult entertainment filmed to look as if the watcher were experiencing the sex act themselves. Barebacking usually refers to a free porn conscious and deliberate choice to forgo condoms. Concerted deployed sexual rejection exercised on the partner can be an aspect of Dominance and Submission as well. A person may be sexually penetrated multiple times simultaneously.